public static void Eagerly_throws_ArgumentNullException_when_items_to_remove_collection_is_null_with_equality_comparer()
{
IEnumerable <char> letters = "abcd";
IEqualityComparer <char> stringLengthEqualityComparer = new StringLengthEqualityComparer <char>();
Assert.Throws <ArgumentNullException>(() => letters.Without(stringLengthEqualityComparer, null));
}
public static void Eagerly_throws_ArgumentNullException_when_sequence_is_null_with_equality_comparer()
{
IEnumerable <char> nullSequence = null;
IEqualityComparer <char> stringLengthEqualityComparer = new StringLengthEqualityComparer <char>();
Assert.Throws <ArgumentNullException>(() => nullSequence.Without(stringLengthEqualityComparer, 'c'));
}
public static void Returns_unmodified_sequence_when_sequence_does_not_contain_any_item_to_remove_with_equality_comparer()
{
IEnumerable <string> stringNumbers = new[] { "1", "22", "333", "4444" };
const string itemToRemove = "55555";
IEqualityComparer <string> stringLengthEqualityComparer = new StringLengthEqualityComparer <string>();
stringNumbers = stringNumbers.Without(stringLengthEqualityComparer, itemToRemove);
stringNumbers.Should().HaveCount(4);
}
public static void Does_not_remove_items_that_do_not_match_the_passed_item_but_each_other()
{
IEnumerable <string> fruits = new[] { "apple", "apricot", "banana", "cherry" };
const string itemToRemove = "apricot";
IEqualityComparer <string> stringLengthEqualityComparer = new StringLengthEqualityComparer <string>();
IEnumerable <string> fruitsWithoutItem = fruits.Without(stringLengthEqualityComparer, itemToRemove);
fruitsWithoutItem.Should().NotContain("apricot");
fruitsWithoutItem.Should().HaveCount(3);
}
public static void Returns_sequence_without_items_equal_to_passed_item()
{
IEnumerable <string> fruits = new[] { "apple", "apricot", "banana", "cherry" };
const string itemToRemove = "banana";
IEqualityComparer <string> stringLengthEqualityComparer = new StringLengthEqualityComparer <string>();
fruits = fruits.Without(stringLengthEqualityComparer, itemToRemove);
fruits.Should().NotContain("banana");
fruits.Should().NotContain("cherry");
fruits.Should().HaveCount(2);
}